Packaging buffing compound and like materials



E. T- CANDEE Nov. 11, 1952 PACKAGING BUFFING COMPOUND AND LIKE MATERIALS Filed March 5. 1949 FIGII FIG. 2

INVENTOR. 17151002797 2' 64,746?

FIG. 4

Patented Nov. 11, 1952 PACKAGING BUFFING COMPOUND AND LIKE MATERIALS Ellsworth T. Candee, Watertown, Conn., assignor to The Lea Manufacturing Company, a corporation of Connecticut Application March 5, 1949, Serial No. 79,901

1 Claims. (Cl. 206-56) This inventionrelates to the packaging of buffing compounds and like materials. The invention provides a new package of buffing compounds that is particularly economical and convenient to use, and provides a novel container for use in preparing such packages.

Buffing compound and other similar compounds are normally packaged and distributed to the trade in cylindrical containers of paperboard. It is important that the compound be distributed in a closed container, because its composition is critical and must be preserved without substantial change from the time of manufacture until the time of use in order for it to give optimum results. Normally when the 7 compound is to be used the package is opened at the top and the cardboard walls of the container are torn back to expose a portion of the stick of the compound therein. The exposed stick is pressed against the buffing wheel periodically in order to charge it with the compound. As the compound is consumed, the walls of the container are torn back still further, until finally there remains only a nubbin of compound which is no longer of suflicient size to be conveniently held against the wheel. This nubbin is usually discarded. In ordinary cases it amounts to '10 to 20% of the total quantity of bufling com ound originally present in the package, and discarding it constitutes a substantial economic waste.

The present invention provides an improved package of greaseless adhesive-containing buffing compound which can be used conveniently without waste, or with very much less waste than heretofore. The new package comprises a paperboard cylinder forming the side walls of a container and having its interior cylindrical surface lined with a layer of substantially nonporous, moisture-impermeable material which is free from the tendency to adhere to buffing compound and which therefore may readily be stripped back from the compound. A substantially rigid metal end closure is secured to one end of the cylinder and reinforces it against collapse; and a false bottom of porous paperboard is mounted in said cylinder in spaced relation with said end closure. The circumference of the false bottom curves downwardly adjacent to the cylindrical wall to form an annular groove with the wall.

The package 'is completed by a charge of greaseless adhesive-containing bufiing compound substantially filling, the container above the false bottom and in direct contact, there- 2 within the cylinder directly against the false bottom and in the annular groove around the circumference of the false bottom, whereby it is fixedly secured to the false bottom. Securing of the compound to the bottom wall is of importance because after the buffing compound has been mostly consumed, the residual nubbin willbe torn from the container by the rapidly revolving buffing wheel unless it is firmly anchored in place at the bottom of the container. The side walls of the container below the bottom provide a handhold for supporting the last available portion of the compound against the wheel.

The substantially rigid metal end closure provided at the lower end of the container below the false bottom serves to reinforce such end against collapse under a compressive force. It is necessary to grip the package tightly when holding th bufiing compound against the wheel, and unless a reinforcing end closure is provided, the handhold at the end of the container is likely to be lost by collapse of the container side walls before all available buffing compound has been consumed. The space between the end closure and the false bottom is substantially free from buffing compound, so that the end of the container where this space exists maybe discarded with correspondingly little waste.

.several plies. of such stock together.

The improved package of bufling compound and the container therefor in accordance with the invention, together with several alternative arrangements for bonding the buifing compound to the container bottom, are shown in the accompaying drawings, in which Fig. 1' is an elevation of a package in accordance with the invention;

Fig. 2 is a section, on an enlarged scale, taken substantially along the line 22 of Fig. 1;

Fig. 3 is a section similar to Fig. 2 but showing a modified form of container bottom; and

Fig. 4 is a section similar to Fig. 2 but showing still another modified form of container bottom.

The package shown in Fig. 1 comprises a paperboard cylinder l0 made in the conventional manner by spirally wrapping paperboard strip stock on a cylindrical mandrel and adhesively securing The container is provided with a false bottom ll formed by a transverse partition l2 located near but spaced'from the lower end of the paperboardcylinder. That portion of the cylinder H! (which forms the side walls of the container) above the transverse partition 12 is filled withbufling comwith. The bufling "compound is," cast in situ,

pound. The top of the container is closed by a cover l3, advantageously a metal end closure crimped to the cylinder; and the lower end of the container below the transverse partition is provided with a rigid reinforcing end closure M, advantageously of metal.

The construction of the container is such that the bufiing or like compound with which it is filled does not adhere to the inner surface of the cylinder Ill, but is firmly bonded to the false bottom H. In using the bufiing compound, the cover 13 is removed and the paperboard cylinder. I is stripped back to expose the upper end portion of the compound, which is then pressed against the bufiing wheel. As the compound isconsumed, the cylinder Finally, it is stripped back about to the location of the false bottom, where a peripheral score 15 advantageously is provided to facilitate tearing it off. This score and the false bottom II are located about at the position where the residual nubbin of. buffing compound would have to be discarded on account of no longer beingof sufiicien't size to provide a handhold for pressing it against the 'bufling wheel. However, with the improved package, there is very little or no buffing compound in the space below the false bottom I l, and what. compound is above the false bottom is firmly bonded thereto so that it'may be pressed against the bufiingwheel without being torn away. Thereby substantially the entire contents'of the package may be safely and conveniently consumed.

The novel features ofthe package shown in Fig. 1 are more clearly seen in Fig. 2. As here shown, the inner surface of the paperboard cylinder I0 is provided with a lining 16 of aluminum or other metal foil. The lining rendersthe inner surface of the cylinder non-absorptive, moistureimpermeable, and non-adherent to the charge of bufiing compound I"! with which the container is filled. In place of metal foil, some other lining material may be used, such, for example, as a coating oflnertplastic material applied in sheet or lacquer form, or even specially treated paperbase materials, such as glassine paper prepared so as to be inert to the bufiingcompound.

The transversepartition 12 which forms the false bottom of the containeris itself advantageously the bottom ofan inverted paper cup inserted into'the lower end of the cylinder 10. It

may be secured in place by means of an adhesive film-applied between the outer surface of the cylindrical walls 18 of the cup and the inner surface of the cylinder it, why staples l9; or alternatively it may be held in place simply by frictional engagement of the cup Walls 18 with the cylinder. The latter alternative provides an especially economical construction, and has been found to be quite satisfactory for most uses of the invention.

The transverse partition I2 is formed of porous paperboard Qe. g., pulpboard) or other fibrous and absorptive material which adheres readily to the bufiing compound. Further, the periphery 2B ofthe transverse partition 12 (where it joins with the walls 18 of the inverted cup) is curved at. a. substantial radius, so that the sides, of the cup adjacent-the transverse partition arespaced from the interior surface of the cylindenforming an annular groove 2| about the periphery of the partition l2.

The container above the false bottom II is Sfllled with buffing compound in the molten state,

and it solidifies. in the container. The molten compound penetrates into the-annular groove 2|,

andalso en'etrates into the poresof the fibrous of compound against a buffing wheel without it becoming torn from the container bottom.

The reinforcing end closure I4 is advantageously of conventional dished metal construction havingsides 22 .whichfit snugly inside the cylindrical walls .18 of thejinverted cup, and having its marginal portion-turned out and thence crimped in against the outer surface of the cylinder ID. The end closure amply reinforces the end of the :cylinder l0 below the transverse partition [2, so

that the end portion of the cylinder does not collapse even when. tightlygrippedior pressing the last of theavailablebufling compound against the .bufiing wheel.

The embodiment of the invention described above .with referenceto Fig. 2 is especially suited for packaging preparations known in the art as greaseless compounds, which comprise mixtures of glue, water, and. abrasive. An alternative embodiment of. the invention adapted for use either in connection with greaseless compound or With themixtureof grease and abrasive that is commonly termed buffing compound is shown inFig. 3. In this modification,.as in the modification described above, the walls of the container are defined bya cylinder 25 of paperboard, to the inside surface. of which is applied a lining 2,6 of aluminum foil or equivalent moisture-.proot nonabsorptive material. which, does not adhere to the bufling compound. A false bottom 2'! for the container is inthis case a double structure formed by upper and lower transversepartitions 28 and29, respectively, which, are spaced apart by ashort .distanceand which bothare spaced inwardly from. the lowerend of. the container cylinder. The transverse partitions 28 and 29 advantageously are themselves the bottoms of a pair of. nested inverted cups having cylindrical side .walls 30 and 3 l, respectively. The side walls of these cups may be secured to each other and to the cylinder 25 by adhesive, or by staples 32, or they may be held in place simply by frictional engagement with each other and with the. cylinder. Thelozwer end' of the cylinder 25 i reinforced against; collapse by ametal end closure 33 similar to the end closure 14 previously described.

The transversepartitions 28 and 29 may or may not be formed of material to which the buffing compound directly adheres, but in any event the upper partition 28 is formed with a series of perforations 34,, while the lower partition-29 is imperforate. When the molten buffing compound is introduced into the container, it flows through the perforations in the upper partition into the space. between it and the lower cylinder is torn. back to expose the compound.

An annular score 31 about the periphery of the cylinder 25 may be provided to facilitate tearing off the cylinder about at the location of the upper transverse partition 28. Because the bufling compound is firmly anchored to the double false bottom, it may be consumed safely down to the upper transverse partition 28, after which the lower end of the container (which provides the handhold for applying the last available part of the compound to the bulfing wheel) may be discarded. With the modification shown in Fig. 3, discarding of the lower end portion of the container results in the loss of that part 36 of compound filling the space between the two transverse partitions. The amount of compound therein, however, is considerably less than the amount that must be discarded in using bufiing compound in the heretofore conventional packages, because the space between the two transverse. partitions is small relative to What must be provided for a good handhold for applying the last available portion of the compound to the bufiing wheel.

Still another modification in accordance With the invention, which is useful for packaging either greaseless compounds or compounds having a grease base, is shown in Fig. 4. The structure here comprises a paperboard cylinder 40, lined on the inside with a layer of aluminum foil 4| or equivalent, which cylinder defines the side walls of a container for the package. A false bottom 42 for the container is provided in the form of an inverted cup, having side walls 43, inserted into the lower end of the cylinder and held in place either by simple frictional engagement with the cylinder, or by fastening means such as adhesive or staples 44, as in the modifications previously described. The lower end of the cylinder 49 is reinforced by a crimped metal end closure 45.

The bottom of the inverted cup forms a transverse partition 46 spaced an appreciable distance above the lower end of the cylinder 49. This transverse partition is formed with a central opening 41 in which is mounted a shallow cup 48 having distended sides 49. The cup is secured to the transverse partition 46 by having its marginal edge portion 50 crimped against the material of the partition about the periphery of the opening 41.

When molten bufiing compound is introduced into the container, it flows into the shallow cup 48, and upon solidification the portion 5| of the compound in the cup is integrally united through the opening 41 with the main body 52 of compound above the partition 46. The distended sides 49 of the cup form undercut surfaces bonding the bufilng compound securely tothe false bottom 42.

Buffing compound packaged as illustrated in Fig. 4 is used in the same manner as that packaged in accordance with Figs. 1 to 3. After removing the top, the sides of the container are torn back to expose the compound, which is then pressed against the buffing Wheel. score 53 may be provided to facilitate tearingoff the cylinder about at the plane of the transverse partition 46. The buffing compound may be completely consumed down to the partition 46, after the sides have been torn back to the score mark 53. because the compound is securely locked to A peripheral 6 the false bottom. The portion of the cylinder below the transverse partition forms a handhold for applying the last available portion of the compound to the bufiing wheel. Only that portion of the compound filling the shallow cup 48 is unavailable for use, and the amount thereof is very much less than in the conventional package heretofore used because its volume is much less than is required to provide a good handhold in applying the packaged material to a buffing wheel.

Th term buffing compound is used extensively in the foregoing specification and in the claim that follows to indicate the composition that is packaged in accordance with the invention. The term is here used in the broad sense to include both the greaseless and the grease-base compounds of commerce for bufiing use, and also to include other compounds of a generally similar nature, such as compounds for polishing, deburring and other uses.

I claim:

A package of greaseless adhesive-containing bufifing compound comprising a paperboard cylinder forming the side walls of a container, a layer of substantially non-porous moisture-impermeable material lining the interior cylindrical wall surface of said cylinder, said layer being free from the tendency to adhere to the buffing compound, a substantially rigid metal end closure secured to said cylinder at one end thereof and reinforcing it against collapse, a false bottom in the form of an inverted paper cup of porous paperboard mounted in and secured to said cylinder wall with the bottom of the cup forming the false bottom positioned in spaced relation with said end closure, said false bottom forming with said cylinder wall an annular groove, and a greaseless adhesive-containing buffing compound substantially filling the container above the false bottom and in direct contact therewith, said material being cast in situ within the cylinder directly against the false bottom and in said groove, whereby said bufling compound is fixedly secured to the bottom.

ELLSWOR'IH T. CANDEE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 691,935 Eaton Jan. 28, 1902 751,047 Bircher Feb. 2, 1904 1,177,252 Kling Mar. 28, 1916 1,284,686 I-Iothersoll Nov. 12, 1918 1,299,032 Rich Apr. 1, 1919 1,322,729 Remington Nov. 25, 1919 1,338,156 Purple Apr. 27, 1920 2,018,075 Leather Nov. 22, 1935 2,352,769 Brown July 4, 1944 2,364,916 Rasmussen Dec. 12, 1944 2,522,708 Fields Sept. 19, 1950 FOREIGN PATENTS Number Country Date 18,819 Great Britain Aug. 19, 1914 165,867 Switzerland Dec. 15, 1933 444,100 France July 30, 1912 667,965 Germany Nov. 23, 1938 

